1) the formula for angle of expansion
张角公式
2) the Angle
张角式
1.
Based on the theory of forest growth and the primal investigation data, three formulas of forest basal area growth rate, the Meyer, the Pressler and the Angle, have been studied farther on their nature in this paper.
根据林分生长理论 ,结合原始调查数据 ,对林业生产中的 3种断面积生长率理论公式Meyer式、Pressler式和张角式的特性作了进一步研究 ,并对 3种方法作了具体验证。
3) tension formula
张力公式
1.
Mathematic modeling of tension formulas and selection of tension values for tandem cold mills;
冷轧张力公式的数模研究及张力值的选定
2.
In this paper a set of tension formulas for composite winding outside thin wall cylinder are established according to theory of cylinder shell.
本文按圆柱壳理论建立了一套在薄壁圆筒外缠绕复合材料的张力公式。
4) tension equation
张力公式
1.
In addition to this equation,three more equations were worked out as well,namely the condition equation for continuous rolling σ(t)=e-τ-1Atσ0+A-1∟I-e-τ-1At」W-1ΔV;the dynamic tension equation;and the steady tension equatio.
=-τ-1Aσ+E/lBU,动态张力公式:σ(t)=e-τ-1Atσ0+A-1∟I-e-τ-1At」W-1ΔV;稳态张力公式:σ=A-1m-1q。
5) formulae for half-angle
半角公式
6) trigonometric formulas
三角公式
1.
Giving intuitive proofs of the trigonometric formulas and formulas for the sum of the powers of natural numbers, which are brief, clear and beautiful, this paper attempts to connect the history with the pedagogy of mathematics and to probe into their relation(HPM for brevity).
作为数学教育改革的一种尝试，文章将数学发展的历史与数学教育相结合，给出了自然数幂和公式与三角公式的直观证明。
补充资料：三角函数和角公式
又称三角函数的加法定理
是几个角的和（差）的三角函数通过其中各个角的三角函数来表示的关系
一般的最常用公式有:
sin(a+b)=sinacosb+sinbcosa
sin(a-b)=sinacosb-sinbcosa
cos(a+b)=cosacosb-sinasinb
cos(a-b)=cosacosb+sinasinb
tan(a+b)=(tana+tanb)/(1-tanatanb)
tan(a-b)=(tana-tanb)/(1+tanatanb)
注意：正切也可以表示为“tg” 如：tana=tga
说明：补充资料仅用于学习参考，请勿用于其它任何用途。
参考词条